| 摘要 |
FIELD: medicine.SUBSTANCE: invention can be used for the intraoperative pupillary dilatation and iris stabilisation during phacoemulsification (PE) or laser extraction (LE) if it is impossible to ensured a drug-induced mydriasis. That is ensured by inserting a ring onto an anterior surface of the iris through a corneoscleral incision 2.2mm long and 2.0mm wide. An outer diameter of the ring makes 6-11 mm, while an inner diameter is 4-6 mm with a thickness of no more than 1 mm. The ring is provided with 4-6 equally spaced support elements on its inner surface perpendicular to the plane of the ring. Besides, the ring has 5-7 manipulation through holes equally spaced on a circle concentric to the ring. The number of the manipulation holes is one more than that of the support elements. Long axes of these holes are parallel to the support elements. One of the manipulation holes is 12-o'clock positioned. Through the manipulation holes, the support elements are delivered behind the iris successively by means of a rotation hook. The cataract is extracted, and an IOL is implanted. The 12-o'clock positioned rotation hook is removed from the anterior eye chamber through the manipulation hole. The incision is sealed with normal saline.EFFECT: method reduces the risk of vitreous body prolapse, formation of posterior capsule ruptures, iris injury and prolapse by stabilising it with the ring inserted into the anterior eye chamber and the more sparing mechanic pupillary dilatation due to the support elements delivered behind the iris, as well as postoperative complications related to induced astigmatism that provides achieving highest possible visual functions.2 ex |
